//#include<iostream>
//extern double warming;
//
//void update(double dt);
//void local();
//
//using std::cout;
//void update(double dt)
//{
//	extern double warming;
//	warming += dt;
//	cout << "Updating global warming to " << warming;
//	cout << " degrees.\n";
//}
//
//void local()
//{
//	double warming = 0.8;
//
//	cout << "Local warming = " << warming << " degrees.\n";
//	cout << "But global warming = " << ::warming;
//	cout << " degrees.\n";
//}